Chemical Change Revision

Bending, crushing, cutting and freezing are:

• a. Physical change.

• b. chemical change

•mixing strawberry syrup into milk •melting ice

• a. Physical change.

• b. chemical change

Melting •Evaporation •Condensation

• a. Physical change.

• b. chemical change

A change in matter that produces one or more new substances:

• a. Physical change.

• b. chemical change.

•Rust •Burning •Cooking

• a. Physical change.

• b. chemical change.

Which of the following can occur when a chemical reaction takes place?

• a. New bonds form.

• b. Existing bonds break.

• c. New substances form.

• d. Changes don't affect matter.

What is the best way to be certain that a chemical reaction has occurred?

• a. Some bubbles form.

• b. A color change occurs.

• c. A new substance forms.d.

• The materials do not react.

Reactant is

• 2Nacl

• 2Na + cl2

Product is

• 2Nacl

• 2Na + cl2

The substances listed on the left side of a chemical equation are the

• reactant

• product